Bones form the framework that supports the body. It also anchors the muscles and serve as storage site of calcium and phosphate. It provides shape to the body and protects vital body organs such as brain, lungs, tissue, etc.

Nervous tissue is made up of neurons that receive and conduct impulses. Neurons are highly specialised for being stimulated and then transmitting the stimulus very rapidly from one place to another within the body. Impulses are the passage of electrical activity along the axon of a nerve cell.